package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * 自动填充切面
 */
@Slf4j
@Component
@Aspect
public class AutoFillAspect {

    /**
     * 定义切点
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointcut() {}

    /**
     * 公共字段填充
     * @param joinPoint
     */
    @Before("autoFillPointcut()")
    public void autoFill(JoinPoint joinPoint) {
        log.info("开始进行公共字段自动填充");
        //获取方法签名
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill=(AutoFill)signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType=autoFill.value();
        //获取方法上的对象信息
        Object[] args=joinPoint.getArgs();
        //判断对象是否为空
        if(args==null||args.length==0){
            log.info("参数为空，不进行公共字段填充");
            return;
        }
        //获取对象
        Object entity=args[0];

        if(operationType==OperationType.INSERT){
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setCreateTime.invoke(entity, LocalDateTime.now());
                setUpdateTime.invoke(entity, LocalDateTime.now());
                setCreateUser.invoke(entity, BaseContext.getCurrentId());
                setUpdateUser.invoke(entity, BaseContext.getCurrentId());
            }catch(Exception e){
                e.printStackTrace();
            }
        }else if(operationType==OperationType.UPDATE){
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateTime.invoke(entity, LocalDateTime.now());
                setUpdateUser.invoke(entity, BaseContext.getCurrentId());
            }catch(Exception e){
                e.printStackTrace();
            }
        }
    }
}
